多项选择题
A. Priority flow control
B. Buffer-to-buffer credits
C. TCP retransmission
D. Ethernet checksum
E. QoS policies
单项选择题 WhichstatementistrueaboutTheQoSClassFibreChannel？（）
单项选择题 WhenbuildingaNICteam（virtualportchannel）betweenahostandapairofCiscoNexus5000SeriesSwitchesthatwillcarryFCoEtraffic，whatisthemaximumnumberofphysicallinksthatcanexistintheteam？（）
单项选择题 WhichstatementiscorrectaboutthenumberofavailableQoSsystemclassesinFCoE？（）